Does Scheuermann's cause height to fluctuate?

My husband, 40 years old now, was diagnosed with Scheuermann's Disease a few years ago. He has good days with little to no pain and bad days where he is in pain for days. I have accompanied him to doctor's appointments, and it appears his height will change. He has been from 67 inches to 71 inches. Taking into consideration his level of pain, time of day, nutrition/diet, weight, etc, will his height fluctuate on any given day? I would like more information specifically about the height changes. Thank you and I appreciate the feedback.